Cannot get tabs to be correctly displayed in JScrollPane [GUI]

Hey guys. I'm still newish to Java, and I'm tinkering with something I haven't found a solution for.

Basically, this program has a JList of a Vector of a data that contains 2 pieces of data, a name and a grade - both strings.
I take this list, and put it in a JScrollPane. Then update the vector using a ListSelectionListener.

To the question:

The toString() function of my class that is made and placed in the Vector looks like: